Fetch Decode Execute Cycle

What does the program counter contain when an instruction is fetched?

• The address of the next instruction

• The opcode of the current instruction

• The data for the current instruction

• The address of the previous instruction

What is the purpose of the memory address register?

• To store the address of the next instruction

• To store the opcode of the current instruction

• To store the data for the current instruction

• To store the address of the data needed for the current instruction

What is the purpose of the current instruction register?

• To store the address of the next instruction

• To store the opcode of the current instruction

• To store the data for the current instruction

• To store the address of the data needed for the current instruction

What happens to the program counter after an instruction is fetched?

• It is incremented by one

• It is decremented by one

• It remains the same

• It is reset to zero

What is the purpose of the memory data register?

• To store the address of the next instruction

• To store the opcode of the current instruction

• To store the data for the current instruction

• To store the address of the data needed for the current instruction

What is the purpose of the accumulator?

• To store the address of the next instruction

• To store the opcode of the current instruction

• To store the data for the current instruction

• To store the result of the current instruction

What happens during a program branch?

• The program counter is incremented

• The program counter is decremented

• The program counter is changed to the operand

• The program counter remains the same

How does the program counter remember how to get back to the previous instruction after a program branch?

• Through a data structure called a stack

• Through a data structure called a queue

• Through a data structure called a linked list

• Through a data structure called a tree